Spacemen Fred's spaceship (which has negligible mass) is in an elliptical orbit about planet Bob. The minimum distance between the spaceship and the planet is R, the maximum distance between the spaceship and the planet is 2R. At the point of maximum distance, spaceman fred is traveling at speed `v_(0)`. he then fires his thrusters so that he enters a circular orbit of radius 2R. what is his new speed?

Options

A. (a)`sqrt(3//2)v_(0)`
B. (b)`sqrt(5)v_(0)`
C. (c)`sqrt(3//56)v_(0)`
D. (d)`sqrt(2)v_(0)`

Answer

A